“W” can stand for a few different things, but in internet slang it most often means win or success. It can also mean with when written as w/ , and in some contexts it refers to a letter, a stock ticker, or a technical abbreviation.

Common meanings

  • Win : Often used online as a quick reaction to something good.
  • With : Usually written as w/ in casual text.
  • Double-u : The name of the letter itself in English.
  • Other abbreviations : It can also stand for many specialized terms in medicine, finance, or science.

Most likely reading

If you saw just “W” in a chat, post, or comment, the safest interpretation is usually “win.” If you saw “w/” , it almost certainly means “with.”

TL;DR: “W” usually means win , while w/ usually means with.